Intron phase distributions predicted using the all-pattern intron insertion model. Error is measured as the χ2 value between the observed and predicted intron phase distributions. The 10 eukaryotes are arranged in descending order of GC contents (%) from left to right. N. cra, N. crassa; D. mel, D. melanogaster; H. sap, H. sapiens; F. gra, F. graminearum; C. neo, C. neoformans; X. tro, X. tropicalis; A. tha, A. thaliana; C. ele, C. elegans; S. pom, S. pombe; P. fal, P. falciparum. * Not significant at the P < 0.05 level. All other comparisons were significant.